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功能高分子学报:2012,25(2):-
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植物多糖干凝胶的制备及其力学性能
(1.湖北工业大学生物工程学院, 武汉 430068;2.湖北工业大学生物工程学院, 武汉 430069;3.黄鹤楼科技园, 武汉 430030;4.黄鹤楼科技园, 武汉 430031;5.黄鹤楼科技园, 武汉 430032)
Preparation and Mechanical Properties of Polysaccharide Cryogel
(1.School of Biological Engineering, Hubei University of Technology, Wuhan 430068, China;2.School of Biological Engineering, Hubei University of Technology, Wuhan 430069, China;3.Huanghelou Research Park, Wuhan 430030, China;4.Huanghelou Research Park, Wuhan 430031, China;5.Huanghelou Research Park, Wuhan 430032, China)
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中文摘要: 以植物多糖淀粉、魔芋葡甘聚糖(KGM)为基材,采用物理改性及共混的方法,原料经溶胶 凝胶,冷冻干燥过程得到植物多糖干凝胶。通过正交试验,得到了制备植物多糖干凝胶的原料配方。探讨了制胶温度、搅拌时间、搅拌速率、溶液pH、预冷冻时间等因素对植物多糖干凝胶弹性、硬度的影响。采用响应曲面法对制备条件进行优化,得到的最佳制备条件为:制胶温度90 ℃、搅拌速率800 r/min、搅拌时间70 min、溶液pH=9、预冷冻时间14 h、预冷冻温度-40 ℃、冷阱温度-50 ℃、真空度12.5 kPa。该干凝胶的弹性、硬度分别为1.812 mm和5.382 Nmin、溶液pH=9、预冷冻时间14 h、预冷冻温度-40 ℃、冷阱温度-50 ℃、真空度12.5 kPa。该干凝胶的弹性、硬度分别为1.812 mm和5.382 N。扫描电镜的观察表明,该植物多糖干凝胶呈立体三维多孔网络结构。
中文关键词: 植物多糖  葡甘聚糖  干凝胶  弹性  硬度
Abstract:The polysaccharide cryogels were prepared by physical modification and blending method using the starch and Konjac Glucomannan(KGM) as basic materials. The process for preparing pdysacchairide cryogel used sol gel and freeze drying method. The best optimum formula was got through orthogonal experiment. Effects of preparation temperature, time, stirring speed, pH, pre freezing time on mechanics properties of polysaccharide cryogel were analyzed. The preparation conditions were optimized by the response surface methodology (RSM). The optimal preparation conditions are: preparation temperature 90 ℃, stirring speed 800 r/min, preparation time 70 min, solution pH=9 and pre freezing time 14 h, cold trapping temperature -50 ℃, vacuum 12.5 kPa. Under these conditions, the springiness and hardness of the cryogel can reach 1.812 mm and 5.382 N, respectively. Scanning electron microscopy(SEM) results indicate that polysaccharide cryogel show stereo three dimensional (3D) porous network structure.
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基金项目:国家自然科学基金资助项目(31071520);国家烟草专卖局基金(110200701003)
引用本文:
孙小华,周丹,柯炜昌,叶娟,李丹,姜发堂.植物多糖干凝胶的制备及其力学性能[J].功能高分子学报,2012,25(2):.
SUN Xiao hua,ZHOU Dan,KE Wei chang,YE Juan,LI Dan,JIANG Fa tang.Preparation and Mechanical Properties of Polysaccharide Cryogel[J].Journal of Functional Polymers,2012,25(2):.